4x4 Solar Powered LED Post Cap LED White Post Vinyl Square Lights (2 Pack) + 2 Extra AA Ni-Co 600mAh Replacement Rechargeable Batteries (Best Deal) 4x4 Dimensions: For Vinyl Fence Posts - Enhence The Look Of your Fence, Backyard, By Installing These Solar Lights. Solar Powered: Lights use solar energy to work -no wires needed-Ideal for areas where conventional electrical supply is not available Automatic Sensor: Turns ON & Off By itself when dark or day CE Certified for ultimate safety Safe Water Resistant